An epoch is but a swing of the pendulum; and each generation thinks the world is progressing because it is always moving.

Granted that the great Life Force has hit on the device of the clockmaker’s pendulum, and uses the earth for its bob; that the history of each oscillation, which seems so novel to us the actors, is but the history of the last oscillation repeated; nay more, that in the unthinkable infinitude of time the sun throws off the earth and catches it again a thousand times as a circus rider throws up a ball, and that the total of all our epochs is but the moment between the toss and the catch,…

There are no more uses of "pendulum" in the book.

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The clock uses a pendulum to keep time.

Now the pendulum has swung the other direction and voters are demanding...